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OSI540B Video Board Model 540B video board © 1978 Supports 32x32, and 64x32 video modes with color, 542 keyboard interface socket Character memory $D000-D7FF each display row always $40 bytes long Color memory $E000-E7FF 4bits.  bit 0: 0= normal(bright txt, color background), 1= inverse(dark txt, br...

I used the code above and decimal to hex convertion in the manual and came up with this ugly bit of code, it works with my set up but it is slow 5 FOR T=0 TO 76 10 PRINT "DUMPING TRACK";T 15 DISK!"EX 4000="+RIGHT$(STR$(100+T),2) 16 L=0 20 FOR S=0 TO 3583 21 L=L+1 25 D=(PEEK(16384+S)) 30 N(0)=D 35 FO...

If he can boot up to 65D, it shouldn't be necessary to use any special software to dump the disks. It seems to me that something like this should work fine: 10 FOR T=0 TO 76 15 PRINT "Dumping track";T 20 DISK!"EX 4000="+RIGHT$(STR$(100+T),2) 30 FOR I=0 TO 3583 40 PRINT#8,CHR$(PEEK(16384+I));:POKE 2...

The only thing I changed in the programs was rom jumps from video to serial.

The disks boot fine so the system is functioning as expected.

I am looking for some suggestion on a problem dumping disks Has anyone dumped 8 inch disks with either of the programs, I am working with a fellow to dump 8 inch disks from a c3 serial . I modified both programs for serial display and they work fine on my 510 board, I can dump the disks I have with ...

Any one using a old at power supply to power your systems I was having issues with my test set up as my bench supply only does 3a so I was using a couple different supplies for +5 -9 +12 and wanted a more permanent solution when I case up my 510 setup I checked the schematics of a couple of older at...

BillO wrote:Nice collection!

I am jealous!

No kidding I would love to play with 65U and all those boards

I can confirm these parts fit the holes.

digikey part #

34 pin A33168-ND
50 pin MHC50K-ND

Here are the parts placement and parts list for the data separator, http://klyball.com/OSI/data/D-13.rar 1 problem we have run into is the drills holes for the 34 and 50 pin connectors are to small to fit some of the connectors, the one’s i had on hand worked for me but others have had problems , th...

Looking good.

I think R20 could be a miss print, as I needed to change it to 1k to get the timing signal correct.